Hello, Client is getting the following error when attempting to do an insert on a table: ERROR: duplicate key violates unique constraint event_tbl_evt_id_key Client is using PostgreSQL 7.4.2 on Sparcv9 running Solaris. We have the following tables: EVENT_TBL evt_id bigserial, unique d1 numeric(13) obj_id numeric(6) d2 numeric(13) val varchar(22) correction numeric(1) delta numeric(13) CONTROL_TBL obj_id numeric(6), unique name varchar(22), unique dtype numeric(2) dfreq numeric(2) Indexes: EVENT_TBL.d1 (non-clustered) EVENT_TBL.obj_id (non-clustered) CONTROL_TBL.obj_id (non-clustered) CONTROL_TBL.name (clustered) Update processes run continually throughout the day in which rows are inserted. Rows are purged by a different process on a daily basis. Rows are added/purged in a queue-like manner, with older rows (i.e. lower 'evt_id' value) purged first. The EVENT_TBL is potentially large (on the order of millions of rows) but certainly not big enough where a 'bigserial' value would ever wrap back to 0. We also drop all the indexes listed above and recreate them on a daily basis. However, we do not do anything to the sequence or index created for the 'evt_id' column. In fact, we do not ever try to do anything directly to 'evt_id' column. Even on inserts we are not specifying a value for 'evt_id' and let the system do its magic. We never attempt to minipulate the sequence/index for the column in any way. Short of the client mucking around with the column in an unauthorized manner, can anybody think of a reason how things might get confused and an already used 'evt_id' value is used again? Regards, Bill __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ---------------------------(end of broadcast)--------------------------- TIP 2: you can get off all lists at once with the unregister command (send "unregister YourEmailAddressHere" to majordomo@xxxxxxxxxxxxxx)